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https://issues.apache.org/jira/browse/SOLR-11873?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16336971#comment-16336971
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ASF GitHub Bot commented on SOLR-11873:
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GitHub user misutoth opened a pull request:
https://github.com/apache/lucene-solr/pull/311
SOLR-11873: Use a time based expiration cache for one off HDFS FileSy…
…stem instances in all functions.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/misutoth/lucene-solr master-hdfsfix
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/lucene-solr/pull/311.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #311
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commit 53ba8bd68f025aa786c40e407b29f354bd12e7f5
Author: Mihaly Toth <misutoth@...>
Date: 2018-01-23T18:58:11Z
SOLR-11873: Use a time based expiration cache for one off HDFS FileSystem
instances in all functions.
----
> Use time based expiration cache in all places in HdfsDirectoryFactory
> ---------------------------------------------------------------------
>
> Key: SOLR-11873
> URL: https://issues.apache.org/jira/browse/SOLR-11873
> Project: Solr
> Issue Type: Bug
> Security Level: Public(Default Security Level. Issues are Public)
> Components: hdfs
> Affects Versions: 7.2
> Reporter: Mihaly Toth
> Priority: Major
>
> {{HdfsDirectoryFactory.exists()}} method already applies caching on
> FileSystem objects. This is not done yet in the {{size()}} method.
> This function is eventually used when querying the core status. Each and
> every query will use the same configuration and start from the first
> configured HDFS NameNode. If that is down Solr will always access this down
> node first without "learning".
> It would be nice to apply the same caching on that function too.
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